Effect of facile nitrogen doping on catalytic performance of NaW/Mn/SiO2 for oxidative coupling of methane

Kim, Heeyeon; Lee, Suhyeong; Jang, Seoyoung; Yu, Ji-Haeng; Yoo, Jong Suk; Oh, Jangwon

doi:10.1016/j.apcatb.2021.120161

Cited by 11 publications

(10 citation statements)

References 43 publications

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“…88,90,105,106 The cCH 3 radicals could be the source of the coupling products where higher hydrocarbons may be formed. 101 In this work, a small amount of carbon monoxide (CO) was detected in the gas phase by GC-MS. This is in agreement with that reported previously, where the presence of excess water has a positive impact on the reduction of CO 2 to CO. 107 No formic acid or methanol was detected during the photoreaction in the gas or liquid phases.…”

Section: Ldh + Hnmentioning

confidence: 95%

“…99 The produced cCH 3 could be stabilized by the presence of nitrogen-containing groups on the catalyst surface. 101 The OH radical, considered an active oxidant, reacts with cCH 3 once formed, and one of the products may be formaldehyde. [102][103][104] It could be produced through the formation of the methoxy group (-OCH 3 ) which is further oxidized by the active O − species to methanediol (HOCH 2 OH), then dehydrated to formaldehyde (HCHO).…”

Section: Ldh + Hnmentioning

confidence: 99%

See 1 more Smart Citation

Visible light photoreforming of greenhouse gases by nano Cu–Al LDH intercalated with urea-derived anions

Sakr,

Abd El-Hafiz,

Elgabry

et al. 2023

RSC Adv.

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Section: Ldh + Hnmentioning

confidence: 95%

Section: Ldh + Hnmentioning

confidence: 99%

Visible light photoreforming of greenhouse gases by nano Cu–Al LDH intercalated with urea-derived anions

Sakr,

Abd El-Hafiz,

Elgabry

et al. 2023

RSC Adv.

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“…The conventional OCM reaction scheme uses rare-earth oxides or carbonate catalysts to transform CH 4 and O 2 or CO 2 into ethane or ethylene. − The reaction is complex and involves homogeneous and heterogeneous reactions. Broadly, there are five kinds of catalyst–support systems that are active for this reaction: (1) pure, highly basic oxides including early lanthanide oxide (except ceria), (2) group IA and IIA metals supported on basic oxides such as Li/MgO, Ba/MgO, and Sr/La 2 O 3 , (3) monophasic oxides, (4) group IA metals supported on certain transition metal oxides, and (5) any of these materials with chloride promoters .…”

Section: Co2 Utilization For Hydrocarbon and Lower Olefin Productionmentioning

confidence: 99%

Perspective on Sorption Enhanced Bifunctional Catalysts to Produce Hydrocarbons

Cruz

Shah

et al. 2022

ACS Catal.

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Sorption-enhanced catalysts are bifunctional materials consisting of a heterogeneous catalyst affixed to a solid sorbent with a combined capacity to selectively capture and convert CO2 directly to value-added fuels and chemicals in the same reactor. The benefits of facile separation of CO2, directly from air or from flue gas, and conversion to chemical commodities is appealing for developing an integrated carbon capture and utilization scheme. The growth of this area is rapidly expanding with interest from catalysis, materials design, and life-cycle analysis researchers. However, the promise of sorption-enhanced catalysts is limited by their reduced thermal stability, CO2 capture capacity, and restricted product streams to C1 hydrocarbons. The prime issue is that the reaction conditions for the capture of CO2, regeneration of the sorbent, and utilization can be vastly different. It remains a challenge to optimize both the properties of the sorbent support material and the heterogeneous catalyst used. This perspective summarizes the current state-of-the-art for the properties of solid sorbents, heterogeneous catalysts, and the combined sorbent-enhanced catalysts for producing hydrocarbons from CO2. Lastly, the perspective discusses challenges and future areas for improving the performance and capture efficiency of sorption-enhanced catalysts.

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“…Researchers improve the performance of OCM reaction by modifying this catalyst through different ways. CH 4 conversion and C 2 selectivity were improved by N‐doping on the active sites of Na 2 WO 4 /Mn 2 O 3 /SiO 2 with pyridine as the N source 25 . TiO 2 was used as an alternative carrier for SiO 2 to provide more oxygen species in the Mn/Na 2 WO 4 ‐based catalyst to promote CH 4 conversion 26 .…”

Section: Introductionmentioning

confidence: 99%

“…CH 4 conversion and C 2 selectivity were improved by N-doping on the active sites of Na 2 WO 4 /Mn 2 O 3 /SiO 2 with pyridine as the N source. 25 TiO 2 was used as an alternative carrier for SiO 2 to provide more oxygen species in the Mn/Na 2 WO 4 -based catalyst to promote CH 4 conversion. 26 The OCM performance with 66.3% C 2+ (olefins and paraffins) selectivity and 25.9% C 2+ yield at 700 C was obtained by using a mixture of BaTiO 3 perovskite and Mn-Na 2 WO 4 .…”

Section: Introductionmentioning

confidence: 99%

Perovskite catalysts for oxidative coupling of methane improved by Y‐doping

Wang

Cai

Cao

et al. 2022

Asia-Pacific J Chem Eng

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Oxidative coupling of methane (OCM) is an effective route for methane direct conversion to ethylene. Perovskite oxides (ABO 3 ) with variable properties are potential catalysts for OCM by adjusting the compositions. In this study, four perovskite catalysts, BaMO 3-δ and BaM 1-x Y x O 3-δ (M = Zr, Ce; x = 0.2), were prepared by the sol-gel method to explore their catalytic performance of OCM.All catalysts are active toward OCM and reach the highest catalytic performance at 800 C. The OCM performance of Ce-based catalysts is higher than that of Zr-based catalysts. The selectivity of C 2 compounds is significantly improved by Y-doping. At CH 4 /O 2 mol ratio of 8, a C 2 selectivity of 67% was achieved on BaCe 0.8 Y 0.2 O 3-δ . Compared with Zr-based catalysts, more amounts of active oxygen species, which are beneficial to OCM, were observed on BaCeO 3-δ and BaCe 0.8 Y 0.2 O 3-δ . Meanwhile, higher contents of moderate and strong basic sites, which are beneficial to OCM, were found on the Y-doped catalysts. This is attributed to the generation of oxygen vacancies caused by Ydoping in the B-site. Therefore, BaCe 0.8 Y 0.2 O 3-δ with more active oxygen species and stronger basicity exhibits the highest performance among the four catalysts.

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Effect of facile nitrogen doping on catalytic performance of NaW/Mn/SiO2 for oxidative coupling of methane

Cited by 11 publications

References 43 publications

Visible light photoreforming of greenhouse gases by nano Cu–Al LDH intercalated with urea-derived anions

Visible light photoreforming of greenhouse gases by nano Cu–Al LDH intercalated with urea-derived anions

Perspective on Sorption Enhanced Bifunctional Catalysts to Produce Hydrocarbons

Perovskite catalysts for oxidative coupling of methane improved by Y‐doping

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